HH-I-515E, FEDERAL SPECIFICATION: INSULATION, THERMAL (LOOSE-FILL FOR PNEUMATIC OR POURED APPLICATION): CELLULOSIC OR WOOD FIBER (19-JUN-1992) [S/S BY ASTM-C739]., This specification covers the composition and physical requirements of chemically treated, recycled cellulosic fiber (wood-base) loose-fill type thermal insulation for use in attics or enclosed spaces in housing, and other framed buildings within the ambient temperature range from -45.6 to 82.2 degrees Centigrade (-50 to 180 degrees Fahrenheit) by pneumatic or pouring application. While products that comply with this specification may be used in various constructions, they are adaptable primarily, but not exclusively, to wood joist, rafters, and stud construction.